This looks fantastic! Reminds me of padmapper, for cars. I'm really liking some of the things you've done to parse out information into a more digestible/searchable format. The dynamic filters, mousing-over-to-see-different-images, and allowing me to 'favorite' listings makes this a godsend compared to manual craigslist-surfing. Have you considered searching by color? I know this won't be easy to parse out but perhaps image recognition would be more reliable?

Well done!